I downloaded firefox and when the download finished, I had the drive on the desktop and a box opened up with the firefox icon in it. I clicked it thinking it would open the program, but nothing happened. I then saw my dock and the little firefox icon would jump once and dissappear and it kept doing that like ever other second. I tried to stop it, but to no avail. Wouldnt let me trash the box or eject the drive from the desktop. I then tried to force quit it, but an error came back and said that firefox cancelled the forcequit. I ended up having to cold shutdown by holding the button on the back of the machine. Any thoughts on why this may have happened?